[INFO] updating cached repository luotaoyeah/learning-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/luotaoyeah/learning-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/luotaoyeah/learning-rust" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/luotaoyeah/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/luotaoyeah/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/luotaoyeah/learning-rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/luotaoyeah/learning-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/luotaoyeah/learning-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 637ed763a330658431c60ca0ad57981803f1a969
[INFO] sha for GitHub repo luotaoyeah/learning-rust: 637ed763a330658431c60ca0ad57981803f1a969
[INFO] validating manifest of luotaoyeah/learning-rust on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of luotaoyeah/learning-rust on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing luotaoyeah/learning-rust
[INFO] finished frobbing luotaoyeah/learning-rust
[INFO] frobbed toml for luotaoyeah/learning-rust written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/luotaoyeah/learning-rust/Cargo.toml
[INFO] started frobbing luotaoyeah/learning-rust
[INFO] finished frobbing luotaoyeah/learning-rust
[INFO] frobbed toml for luotaoyeah/learning-rust written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/luotaoyeah/learning-rust/Cargo.toml
[INFO] crate luotaoyeah/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking luotaoyeah/learning-rust against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-5/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/luotaoyeah/learning-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3befea0c108a3c601798c5bfeae32b0fd53adc7057210f0cdbeaaedb40192815
[INFO] running `"docker" "start" "-a" "3befea0c108a3c601798c5bfeae32b0fd53adc7057210f0cdbeaaedb40192815"`
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `crate::books::beginning_rust`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::books::beginning_rust;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::books::beginning_rust`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::books::beginning_rust;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     5
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i03`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_01.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let i03: u32;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_i03`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i01`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let i01: u32;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_i01`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i02`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut i02: u32;
[INFO] [stderr]    |             ^^^ help: consider prefixing with an underscore: `_i02`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_01.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let i01: u32 = 9; // warning: unused variable: `i01`
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_i01`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n01` is never read
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_09_change_of_type_and_of_mutability/ch_03_09_01.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut n01: i32 = 9;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_01.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let x: i32 = 9;
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_02.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut x = 9;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_04.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let y = 9;
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_01.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |     for (i, v) in arr01.iter().enumerate() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_03_not_mutated_mutable_variables/ch_03_03_01.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut i: u32 = 9;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_01.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut n: u32 = 9;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut str01: String = String::from(s01);
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_02.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let mut s01: String = String::from("FOO");
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_03_printing_combinations_of_literal_string/ch_01_03_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_01_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_03_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_03_printing_combinations_of_literal_string/ch_01_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_01_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_04_printing_several_lines_of_text/ch_01_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_04_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_04_printing_several_lines_of_text/ch_01_04_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_05_printing_integer_numbers/ch_01_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_07_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_07_comments/ch_01_07_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_07_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_01_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_01_adding_integer_numbers/ch_02_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_02_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_02_other_operations_between_integer_numbers/ch_02_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_03_floating_point_arithmetic/ch_02_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_03_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_03_floating_point_arithmetic/ch_02_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_02_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_04_sequences_of_statements/ch_02_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_03`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_03.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_01_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_01_associating_names_to_values/ch_03_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_02_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_02_mutable_variables/ch_03_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_03_not_mutated_mutable_variables/ch_03_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_03`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_06_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_06_boolean_values/ch_03_06_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_06_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_06_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_06_boolean_values/ch_03_06_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_06_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_07_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_07_boolean_expression/ch_03_07_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_07_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_08_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_08_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_08_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_08_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_09_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_09_change_of_type_and_of_mutability/ch_03_09_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_09_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_10_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_10_assignment_arithmetic_operators/ch_03_10_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_10_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_11_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_11_using_the_functions_of_the_standard_library/ch_03_11_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_11_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_11_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_11_using_the_functions_of_the_standard_library/ch_03_11_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_11_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_02_02_02_04`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_02_data_types/ch_03_02_02_compound_types/ch_03_02_02_02_array_type/ch_03_02_02_02_04.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn fn_03_02_02_02_04() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `another_fn`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_01.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn another_fn() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn fn_01() {
[INFO] [stderr]   | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn fn_03_03_01_02() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn fn_02() {
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_02_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_01.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn fn_01(x: i32, y: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_02_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_02_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_01.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn five() -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn five() -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_03.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `plus_one`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_03.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn plus_one(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_04_comments/ch_03_04_01.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn fn_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_05_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_05.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_02_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_02_repetition_with_loops/ch_03_05_02_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_03_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_03_returning_from_loops/ch_03_05_03_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_04_conditional_loops_with_while/ch_03_05_04_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_04.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn fn_03_05_05_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_01.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn fn_04_01_01() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_03`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn fn_04_01_03() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn fn_01() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn fn_02(mut str01: String) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_05.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn fn_01(s: String) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn fn_02(i: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn fn_03(a: A) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_06_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_06_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_01.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn fn_01() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn print_type<T>(_: &T) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     5
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i03`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_01.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let i03: u32;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_i03`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i01`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let i01: u32;
[INFO] [stderr]    |         ^^^ help: consider prefixing with an underscore: `_i01`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i02`
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let mut i02: u32;
[INFO] [stderr]    |             ^^^ help: consider prefixing with an underscore: `_i02`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_01.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let i01: u32 = 9; // warning: unused variable: `i01`
[INFO] [stderr]   |         ^^^ help: consider prefixing with an underscore: `_i01`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n01` is never read
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_09_change_of_type_and_of_mutability/ch_03_09_01.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut n01: i32 = 9;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_01.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let x: i32 = 9;
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_02.rs:17:13
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let mut x = 9;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_04.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let y = 9;
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_01.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |     for (i, v) in arr01.iter().enumerate() {
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_03_not_mutated_mutable_variables/ch_03_03_01.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let mut i: u32 = 9;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_01.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let mut n: u32 = 9;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut str01: String = String::from(s01);
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_02.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let mut s01: String = String::from("FOO");
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_03_printing_combinations_of_literal_string/ch_01_03_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_01_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_03_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_03_printing_combinations_of_literal_string/ch_01_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_01_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_04_printing_several_lines_of_text/ch_01_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_04_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_04_printing_several_lines_of_text/ch_01_04_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_05_printing_integer_numbers/ch_01_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01_07_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_01_printing_on_the_terminal/ch_01_07_comments/ch_01_07_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_01_07_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_01_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_01_adding_integer_numbers/ch_02_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_02_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_02_other_operations_between_integer_numbers/ch_02_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_03_floating_point_arithmetic/ch_02_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_03_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_03_floating_point_arithmetic/ch_02_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_02_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_04_sequences_of_statements/ch_02_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02_05_03`
[INFO] [stderr]  --> src/books/beginning_rust/ch_02_doing_arithmetic/ch_02_05_breaking_literal_strings/ch_02_05_03.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_02_05_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_01_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_01_associating_names_to_values/ch_03_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_02_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_02_mutable_variables/ch_03_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_03_not_mutated_mutable_variables/ch_03_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_03`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_04_uninitialized_variables/ch_03_04_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_05_the_leading_underscore/ch_03_05_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_06_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_06_boolean_values/ch_03_06_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_06_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_06_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_06_boolean_values/ch_03_06_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_06_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_07_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_07_boolean_expression/ch_03_07_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_07_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_08_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_08_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_08_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_08_type_consistency_in_assignments/ch_03_08_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_08_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_09_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_09_change_of_type_and_of_mutability/ch_03_09_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_09_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_10_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_10_assignment_arithmetic_operators/ch_03_10_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_10_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_11_01`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_11_using_the_functions_of_the_standard_library/ch_03_11_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_11_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_11_02`
[INFO] [stderr]  --> src/books/beginning_rust/ch_03_naming_objects/ch_03_11_using_the_functions_of_the_standard_library/ch_03_11_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_11_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_02_02_02_04`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_02_data_types/ch_03_02_02_compound_types/ch_03_02_02_02_array_type/ch_03_02_02_02_04.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn fn_03_02_02_02_04() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `another_fn`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_01.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn another_fn() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn fn_01() {
[INFO] [stderr]   | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_01_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn fn_03_03_01_02() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_01_functions/ch_03_03_01_02.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn fn_02() {
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_02_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_01.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | fn fn_01(x: i32, y: &str) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_02_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_02_functions_parameters/ch_03_03_02_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_02_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_03_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_03_function_bodies_contain_statements_and_expressions/ch_03_03_03_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_03_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_01.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn five() -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_03_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `five`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_02.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn five() -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_03_04_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_03.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_03_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `plus_one`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_03_functions/ch_03_03_04_functions_with_return_values/ch_03_03_04_03.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn plus_one(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_04_comments/ch_03_04_01.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn fn_03_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_03_05_01_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_01_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_01_if_expressions/ch_03_05_01_05.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_01_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_02_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_02_repetition_with_loops/ch_03_05_02_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_02_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_03_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_03_returning_from_loops/ch_03_05_03_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_03_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_04_conditional_loops_with_while/ch_03_05_04_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_01.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_03_05_05_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03_05_05_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_03_common_programming_concepts/ch_03_05_control_flow/ch_03_05_05_looping_through_a_collection_with_for/ch_03_05_05_04.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn fn_03_05_05_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_01.rs:21:1
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn fn_04_01_01() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_02.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_03`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn fn_04_01_03() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn fn_01() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_03.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn fn_02(mut str01: String) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_04_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_02`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_02.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_02() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_03`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_03.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_03() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_04`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_04.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_04() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_04_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_04_memory_and_allocation/ch_04_01_04_05.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn fn_04_01_04_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_05`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_05() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn fn_01(s: String) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_02`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn fn_02(i: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_03`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_05.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn fn_03(a: A) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_04_01_06_01`
[INFO] [stderr]  --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_01.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn fn_04_01_06_01() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `fn_01`
[INFO] [stderr]   --> src/books/the_rust_programming_language/ch_04_understanding_ownership/ch_04_01_what_is_ownership/ch_04_01_06_return_values_and_scope/ch_04_01_06_01.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn fn_01() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_type`
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn print_type<T>(_: &T) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 11.65s
[INFO] running `"docker" "inspect" "3befea0c108a3c601798c5bfeae32b0fd53adc7057210f0cdbeaaedb40192815"`
[INFO] running `"docker" "rm" "-f" "3befea0c108a3c601798c5bfeae32b0fd53adc7057210f0cdbeaaedb40192815"`
[INFO] [stdout] 3befea0c108a3c601798c5bfeae32b0fd53adc7057210f0cdbeaaedb40192815